Sewing machine



S. ADLER SEWING MACHINE Sept. 11, 1962 4 Sheets-Sheet 1 Filed Oct. 1.1959 4 INVENTOR. saz'a/va/y 401:2

n h r I n: i

Sept. 11, 1962 s. ADLER 3,053,207

SEWING MACHINE Filed Oct. 1, 1959 4 Sheets-Sheet 2 INVEN TOR. $040, 10401 2 Sept. 11, 1962 s. ADLER 3,053,207

SEWING MACHINE Filed Oct. 1, 1959 4 Sheets-Sheet 3 IN VEN TOR.

$4.4 a/ra/r x0152 S. ADLER SEWING MACHINE Sept. 11, 1962 4 Sheets-Sheet4 Filed Oct. 1, 1959 INVENTOR. 5010mm) In 2 United States Patent3,053,207 SEWING MACHINE Solomon Adier, Kew Gardens, N.Y., assignor toNippon Sewing Machine Mfg. Co., Ltd, Nagoya, .Fapan, a corporation ofJapan Filed Oct. 1, 1959, Ser. No. 843,852 9 Claims. (Cl. 112-158) Thisinvention relates to a structurally and functionally improved sewingmachine by means of which ornament-at and novel stitch patterns may beproduced by relatively unskilled operators.

It is a primary object of this invention to furnish such a machineinvolving a novel and simple mechanism capable of ready and speedyproduction and which will operate over long periods of time with freedomfrom all diiiiculties.

Among further objects of the invention are the combining of a mechanismof this type with the needle bar of a sewing machine in order to impartpredetermined movements to the latter such that a zigzag stitch will beproduced, and the combining of that mechanism with the feed dog controlof the machine so that a great variety of ornamental stitches Will beavailable to the user of the mechanism.

With these and other objects in mind, reference is had to the attachedsheets of the drawings illustrating prac tical embodiments of theinvention and in which:

FIG. 1 is a fragmentary perspective View of a preferred form of controlmechanism;

FIG. 2 is a sectional front view of that mechanism;

FIG. 3 is a perspective view of a pair of components included within theassembly as shown in FIGS. 1 and 2;

FIG. 4 is a perspective view of the mechanism which may be present in asewing machine with the present teachings incorporated therein; and

FIG. 5 is a view similar to FIG. 1 but showing an alternative form ofmechanism.

Referring primarily to FIG. 4, by way of illustration of a sewingmachine to which the present invention may be applied, the dot-and-dashlines under the numeral 16 indicate a suitable machine bed from which acolumn or pedestal extends in an upward direction and is continued inthe form of an arm 12 terminating in a head 13. In accordance withconventional practive, there extends through the upper ends of the headand pedestal portions and throughout the length of the arm a rotatablymounted shaft 14. At one end, this shaft convenienlty has associatedwith it a wheel 15. Shaft 14- is rotated by an electric motor orotherwise, and may be driven by a belt (not shown) engaging the pulleyportion 16 of wheel 15. Adjacent its opposite end, shaft 14 convenientlymounts a crank 17 which by means of a pitman or link 18 serves toreciprocate a needle bar 1?. The latter is slidably mounted within aguide 20 pivotally supported as at 21 so that the needle bar in additionto straight reciprocation may move laterally.

Within the bed 1%) of the machine, rock shafts 22 and 23 are rotatablysupported. Shaft 23, by means of a crank 24-, serves to reciprocate feedbar 25. The latter is guided in any desired conventional manner andconnected to a feed dog 26. Shaft 22. by means of gearing 27 serves todrive a gear 28 fixed to a loop taker 29 to actuate the latter. Also itmoves the feed dog in accordance with usual practice. Shafts 22, and 23are oscillated conveniently by rocking cranks 30 and 31 and connectedrespectively to pitmans 32 and 33. The former has its upper end coupledto a crank portion 3 3,53,Z07 Patented Sept. 11, 1962 forming a part ofdrive shaft 14. Pitman 33 is oscillated by means of an eccentric 35carried by shaft 14 and conveniently engages that eccentric by beingprovided with a forked upper portion 36 between the arms of which theeccentric rides. Pitman 33 is pivotally supported as at 37 by a suitableportion of the housing.

The head 13 of the machine in a conventional manner carries aspring-influenced presser bar 38 supporting at its lower end a presserfoot 39 which lies adjacent feed dog 26 and the needle carried by bar19. Beyond this, the mechanism may include a lever 40 extendingoutwardly from the housing of the machine and by means of which, inwell-known manner, the stitch length and the direction of the feed ofthe material, as controlled by the dog 26, are regulated. Also, theremay extend beyond the housing of the machine a control or knob 41, inaddition to a pattern knob or control 4 2. The former serves to permitregulation of the bight. The latter controls the stitch pattern asproduced by the machine in accordance with the present teachings.

In FIG. 4 various detailed structures have been omitted. All of them maybe more or less conventional and are well understood by those conversantwith the art and the structures necessary in a sewing machine of thezigzag type. They will include proper bearings for shaft 14 and suitablecouplings between these bearings and the housing portions of themachine. Similar necessary coupling structures will exist between thesupports for shafts 22 and 23 and the bed portion of the machine as wellas between the pivot 21 and the head 13. Other structures have beenshown but need not be herein described, in that their design andoperation are well understood, not alone in the case of straight stitch,but also in the instance of zigzag machines.

The lateral movements of needle bar 19 are controlled by means of a link43. This link has one of its ends pivotally connected as at 44 to thesupport or carriage 20. It is apparent that as this link isreciprocated, support 20 will rock around pivot 21 to thus cause needlebar 19 to oscillate.

With a view to reciprocating link 43, drive shaft 14 mounts a gear 45.The latter meshes with the teeth of a gear 46 connected by a suitablysupported shaft with an eccentric 47. As in FIG. 1, a member 48 havingits inner face channeled receives within that channel the eccentric.That member is rockingly supported as at 49 and carries in a channeldefined by flanges St a block 51, so that the latter may slide towardand away from the pivot 49. That block is connected to the inner end oflink 43. It is apparent that as shaft 14 rotates, needle bar 19 will bereciprocated. Also, member 48 will oscillate around its pivotal mounting4l9 incident to the action of eccentric 47. With such oscillation, link43 will reciprocate to impart lateral movement to carriage or guide 20and consequently the needle carried by bar 19. The farther block 51 isshifted away from pivot 49, the greater will be the amplitude ofreciprocation imparted to link 43. The more block 51 is moved towardspivot 49, the smaller will be the amount of reciprocation. With theinner end of link 43 in substantial alignment with pivot 49, noreciprocation will occur.

As in FIG. 1, wherein the mechanism is achieving merely lateralmovements of the needle bar, the pattern dial or control 42 is securedto a shaft 52 supported for rotation Within the housing. As illustrated,that dial conveniently carries indicia in the form of a series ofsymbols representative of the type of stitch which will be producedaccording to the position assumed by the dial. There may also beincluded in these symbols an indication of a position assumed by theparts in which no mechanism will automatically function to produce fancyor embroidery stitches. A registering mark or equivalent, as indicated,may serve as a guide with which the various subdivisions of the dial maybe aligned. Secured to shaft 52 are a plurality of elements 53 havingcam or actuating portions 54. As hereinafter brought out, these mayserve as selectors under the control of the operator to permit controlof the machine so that a desired stitch will be produced.

To achieve this, a supporting shaft 55 is provided adjacent and parallelto shaft 52. This shaft mounts a plurality of arms 56 each in permanentalignment with one of the elements 53. The inner ends of arms 56terminate in follower portions 57 engageable with the cam or projectingparts 54. The opposite ends of arms 56 serve to support operating cams.The design providing for this structure is best illustrated in FIG. 3.

In that view, the numeral 58 designates an aperture within an arm 56 andthrough which shaft 55 extends so as to rockingly support the arm.Opposite the follower portion 57 the arm provides in its end zone anopening 59. A cam 69 embodies a suitable configuration and has extendingfrom it a disk-shaped portion 61 of a diameter related to the diameterof opening 59. This disk portion may be either integral with the cam orelse suitably affixed to the same. Its thickness should preferably beequal to that of arm 56. As will be apparent, with disk portion 61within the aperture 59, the cam will be supported for rotation by thearm 56. Also, the weight of the assembly thus furnished will assure thatthe arm 56 under the action of gravity will tend to maintain itsfollower portion 57 in an elevated position. Cam 60 is rotated withrespect to the arm preferably by forming in the inner edge of the disk61 an annular series of gear teeth 62, thus furnishing a ring gear.

In common with elements 53, the cam and arm assemblies 56-60 aredisposed adjacent each other. A shaft 63 is supported for rotation bythe arm portion 12 of the housing and extends through the openingsdefined by the ring gears 62 of the several cams. Within that area, thisshaft is formed with teeth 64- to provide a pinion portion common to andmeshing with all of the ring gears of the several cams. A worm 65 ismounted by drive shaft 14 and engages with a worm wheel 66 fixed againstmovement with respect to shaft 63. Accordingly, as shaft '14 rotates,shaft 63 will be turned, and due to the fact that its pinion portiondrivingly engages the teeth of the cam elements, the latter will beconstantly rotated.

Considering FIG. 2 in conjunction with FIG. 1, it will be observed thata finel transverse shaft 67 is rotatably supported by the housing andthat a follower 68, preferably in the form of a rod, is provided whichoverlies the entire bank of cam assemblies driven by rotation of shaft63. This rod is mounted by arms 69 carried by shaft 67. The followerthus provided is urged in the direction of the cam peripheries bysecuring an arm 70 against movement with respect to shaft 67 andconnecting to that arm one end of a spring 71, the opposite end of whichis secured to a part fixed with respect to the housing. By thisstructure it is obvious that the follower shifts toward and away fromthe axis of shaft 63 and is not capable of moving axially of that shaftor shaft 67. The cams 60 being maintained against sidewise movementswith respect to arms 56 and the latter being maintained by theircoupling with shaft 55 against axial movements with respect to thatshaft, it is apparent that these cams will maintain fixed stations asthey are rotated by the turning of shatf 63.

With a view to having the movements of link 43 respond to the drivingforces exerted not alone by eccentric 47 but also by the operatingearns, a coupling structure is employed. That structure convenientlyincludes an arm 72 affixed to shaft 67 and carrying a pin 73. This pinrides within a notch 74 formed in a bell crank member 75. The latter ispivotally supported with respect to the housing of the machine by ashaft indicated at 76. The second arm of bell crank lever 75 alsoconveniently termintes in a notch portion 77. Riding within the latteris a pin 78 affixed to the inner end of link 43. It is thus apparentthat as follower 68 is shifted by a given cam 60 of the group or seriescarried by arms 56, shaft 67 will be rocked to correspondingly move arm72. This in turn will transmit rocking motion to bell crank lever 75 andthus the pin 78 affixed to link 43. This will cause the inner end of thelink to be moved towards and away from the pivot 49. As illustrated,shaft 67 may have affixed to it a knob 79 positioned beyond the exteriorface of the housing. A detent structure (not shown) may serve to retainshaft 67 in a position where follower 68 is by knob 79 above the cams sothat the follower is not effected by them.

Considering the operation of the mechanism so far described, it isapparent that with the machine properly threaded and material disposedbelow the presser foot 39, a rotation of shaft 14 will cause needle bar19 to bc reciprocated and the feed dog 26 to shift the material in theintervals between stitches. Simultaneously with the formation of thesestitches, link 43 may be reciprocated due to the oscillation of member48 around its pivot 49 as caused by the eccentric 47. If desired, astructure may be furnished for preventing this reciprocation by simplyattaching to the shaft 80, mounting knob 41, an eccentric 81 which willbear against the edge of link 43; a spring 82, conveniently associatedwith the outer arm of bell crank 75, assuring this contact. Obviously,if eccentric 81 is shifted to a position such that link 43 has its innerend lowered to a point where pin 32 is substantially in line with pivot49, no movement of link 43 will occur, and straight stitching willresult. Under these or other circumstances, control 40 may be actuatedto govern the operation of rock shaft 22 to vary the length of thestitches or to cause a reverse feeding of the material being operatedon.

Assuming that eccentric 81 does not occupy a position such that link 43is maintained in stationary condition, and that dial 42 has been shiftedto a position at which the portion 54 of a desired selector element 53is in engagement with the follower 57 of an arm 56, then the oppositeend of that arm will be elevated. With such elevation, the correspondingcam will be raised to the zone of follower 68. Such raising will notresult in a disengagement of teeth 64 from the teeth 62 of the selectedcam or any other cam of the group. Consequently, the relationship of theseveral cams will be maintained. With the establishment of the describedcondition of the parts, then selected cams 60 will individually rockfollower 68. This movement will be transmitted by shaft 67 to crank 72and thus to the inner end of link 43, which will be shifted toward andaway from pivot 49.

Accordingly, instead of that link being simply reciprocated merely in amanner corresponding to the contours of eccentric 47, a modulation andvariation of such shifting will occur as determined, by the cam and restportions of operating unit 60 as superimposed upon the actions andmovements created by eccentric 47. Thus, a desired stitch pattern isproduced. As will be appreciated, by manual adjustment of knob 41, thecharacteristics of this pattern may be altered. In other words, byshifting the inner end of link 43 upwardly, away from the pivot 49, thatlink will still receive the combined impulses and movements transmittedto it by eccentric 47 and the cam 60 which has been selected, but thepattern will have a broader scope. Conversely, by moving the linktowards pivot 49, the scope of the pattern will be diminished as thatlink moves downwardly under the influence of spring 82 or otherwise.

The arrangement of apparatus may be modified so that the lateralmovements of the needle bar are governed by three controls, in additionto any control exercised by actuation of knob 41 or its equivalent.These three controls will involve the cam or eccentric 47 and a groupingof mechanism such as is shown in FIG. 1 to modify and amplify theresultant movements of link 43 as afore described. In addition, asubstantial duplication of the mechanism as generally shown in FIG. 1will be present. This duplication will control the position of theneedle, in other Words, the definite shifting and maintaining of theneedle bar for desired time intervals in positions at which the needlewill stitch along a given line or else to the left or right of thatline. Such an arrangement of mechanism has been shown in FIG. 5.

In that view, the numeral 42 again indicates a pattern dial. This dialis secured against movement with respect to a shaft 83 corresponding toshaft 53 as previously described. =In common with the previousillustration, this shaft mounts a group of lifter selector cams in theform of elements 84, each formed with projections 85. These willcooperate with pattern cam lifters embracing arms 86 mounted solely forrotation with respect to a shaft 87 The latter corresponds to shaft 55as previously described. These arms will also have follower portions tocooperate with the projections 85 of elements 84 and will mount earns 87corresponding to the cam-s 60; one of those cams 87 being shiftable toan elevated position to cooperate with a follower bar 88 mounted tooscillate shaft 89. That shaft will also carry a crank 98 operativelycoupled to a bell crank 91 in turn connected to link 43 in the samemanner as described in connection with FIG. 1. It will be observed thatshaft 89 does not extend across the entire housing. Rather, in FIG. 5,this shaft terminates substantially midway of that housing. In line withthat shaft is a second shaft 91" which by means of crank 92 mounts afollower 93 common to a group of cams 94. l hose cams correspond to andare preferably of the same general type as cams 87 and the cams 60 asillustrated in FIG. 3. Also, they are mounted on arms 95 correspondingto the cam lifter arms 86 and 56. Arms 95 are mounted on shaft 87' andhave follower portions 96 engageable with projections 97 forming partsof each of a group of selector elements 98. Those elements function aslifter selector cams in the same manner as elements 84 and 53. At thistime it is to be noted that in FIG. 5 merely four elements, arms andcontrol cams have been shown in each of the two groups illustrated. Thishas been done with a View to avoiding confusing complications of thedrawings. As will be understood, a greater or lesser number of controlcams, together with the necessary associated mechanism, might beincluded in each group; the same being true of the structure hereinafterdescribed in connection with FIG. 4.

In any event, shaft 91 has connected to it an arm 99. This arm, by meansof a pin and slot connection 100, serves to rock a bell crank lever 101around its point of pivotal mounting 102 as shaft 91 oscillates. Thesecond arm of the bell crank lever is connected conveniently by a pinand slot connection 103 with an arm 104. The latter is secured to ashaft corresponding precisely to shaft 67. This shaft carries an arm orcrank 105 to which a member 48 is pivotally connected as at 106. Thisconnection is provided in lieu of the pivot 49 in FIG. 1. Also, incommon with the previously described structure, the main drive shaft 14,by means of suitable gearing 45 and 46, serves to rotate the eccentricor cam 47 controlling the movements of member 48; a block 51 beingslidably confined for movement longitudinally of member 48 and servingby means of a pin 32 to connect the inner end of link 43 with theassembly. The outer end of arm 104 has connected to it the free end of aspring 108, the opposite end of which is secured against movement withrespect to the casing. This spring assures that follower 93 willconstantly be urged into engagement with the periphery of the selectedcontrol cam 94. Addi- 6 tionally, in lieu of spring 82, a spring 1419may be employed which has its free end connected to link 43. Thisassures that follower 88 will constantly be urged toward a position atwhich it engages the periphery of a selected control cam 87.

As will be understood, in connection with a mechanism of the type shownin FIG. 5, a turning of shaft 83 will serve to lift a selected cam 87 toa position where it cooperates with the follower 88. Therefore, as themechanism operates, that follower will be rocked to correspondingly movethe inner end of link 43 in the manner heretofore described, and thuscontrol the lateral movements of the needle bar so that a pattern willbe produced by the combined action of the selected pattern cam andeccentric 47. Simultaneously with this operation of the mechanism,follower 93 will be rocked to transmit movements to shaft 67. Thatshaft, through arm 105, will control the position of the needle bytransmitting movements to link 43 through pivot 106 and member 48.Therefore, the resultant pattern will also include factors as controlledby one of the cams 94. The other parts of the machine as heretoforedescribed may all be present, so that a competent operator will be ableto produce simple or involved stitch patterns precisely as desired.

Attention is now again invited to FIG. 4 and especially to the detailedoperating mechanism controlling the functioning of the stitch-formingapparatus. It will be primarily seen that the mechanism as illustratedin FIG. 5, involving the needle or bight control and the positioncontrolS, has been illustrated. For this purpose, the same referencenumerals as designated the parts in FIG. 5 have been employed inconnection with corresponding parts in FIG. 4. In addition, there isshown in FIG. 5 in the assembly a further group of control cams. Theseserve to govern the operation of the feed dog 26. According.-

ly, the latter may, under this control, produce long stitches or shortstitches, together with stitches of intermediate lengths. Also, it mayserve to feed the material being worked on in either a forward orreverse direction.

Thus, in FIG. 4 a third group of lifting selector cams 107 is carried byshaft 83. These cams or elements cooperate with arms corresponding toarms 56, 86 and in order to selectively raise one of those arms and thecam 110 carried thereby. A follower 111, preferably in the form of abar, overlies the cams 110 of the third group. As in the priorstructure, the follower and cams are secured against axial movementswith respect to each other, and the cams are driven by a pinion shaft 63or its equivalent, that shaft being common to all three groups of camsand maintaining the timed relationship of all groups as well as the camsindividual to each group. Follower 111 is supported by arms, one ofwhich, as at 112, is in the form of a bell crank. These arms arerockable around the axis of a supporting shaft 113. The second arm ofbell crank 112 is pivotally connected to one end of a link 114. Theopposite end of that link is also pivotally connected to an arm 115carried by a shaft 116 rotatably mounted with respect to and preferablyextending transversely of the machine housing, as shown. Shaft 116 alsocarries an arm 117, which by means of a rod or link 118 is connected tothe stitch length and reverse control lever 40. The parts are normallymaintained in a predetermined position where a forward feed of thematerial being worked upon results in a predetermined stitch lengthbeing achieved.

As will be understood, with a cam 11% of the third group having beenselected and raised to elevated position by the proper element 107,shaft 63 will cause the periphery of that cam to traverse follower 111,thereby swinging the latter and rocking bell crank 112, link 114, shaft116 and arm 117. Follower 111 will be maintained in operativeassociation with the selected control cam by the tension exerted throughspring 119 acting back through the linkage through bell crank 112. Inany event, as rod or link 118 is reciprocated through this cooperationof parts, control 40 will be shifted. Initial shifting will result inthe length of the stitches produced being diminished, in that feed dog26 will feed the material at a lesser rate of speed. By moving the partsto a further position, feed dog 26 may become inoperative to shift thematerial, incident to the move ment occurring on the part of pitman 33.If control portion 40 is moved beyond this position, then a reverse feedof the material will occur.

It is preferred that the ratio of drive between gears 45 and 46 be suchthat for each two revolutions of shaft 14, eccentric 47 will make onerevolution. The ratio of drive between worm 63 and worm gear 66 willdepend upon the contouring of the several cams which are driven by thepinion shaft. On the pattern dial 42 shown in FIG. 4, various stitcheshave been illustrated. By way of example, the one shown at A is achievedsolely by the cams of group 96. The pattern at B follows as aconsequence of the response of the mechanism to selected cams of groups87 and 94. The pattern under C results from the control exercised byindividual cams of groups 87. Again, the pattern under D is caused bythe action of the individual cams in groups 87 and $4, similarly to thepattern under B. The stitch pattern indicated at E results from thecombined response of selected cams of groups 94 and 110. A stitch of thetype indicated at F is achieved by control of the mechanism byindividual cams of groups 87, 94 and 110. The G type stitch resultssolely from the operation of a cam of the 87 group, and a stitch as at His produced by the operation of a cam of the same group. The dial willalso preferably as shown include a suitable symbol or legend, which, ifadjusted to proper position by rotation of the dial, will result in nocam of any of the three groups being lifted to a position at which itcooperates with its follower. of course, under all foregoing conditionsthe eccentric 47 will produce the basic reciprocation of link 43. Alsounder all these conditions, knob 4-1 may be adjusted to further modifythe characteristics of the resultant stitch.

Thus, among others, the several objects of the invention as specificallyaforenoted are achieved. Obviously, numerous changes in construction andrearrangements of the parts may be resorted to without departing fromthe spirit of the invention as defined by the claims.

I claim:

1. A sewing machine to produce ornamental stitches including incombination a frame, a rotatable drive shaft mounted thereby, a needlebar, means for supporting the bar for both lateral and reciprocatingmovements with respect to said frame, means for connecting said bar withsaid drive shaft to reciprocate as said shaft rotates, movable meansconnected to said supporting means for effecting lateral movements ofthe latter and bar, an operating assembly comprising a plurality ofselector earns, a manually rotatable shaft mounting the same andsupported by said frame, arms mounted by said frame to be engaged bysaid cams and rocked thereby, apertured pattern cams rotatably supportedone by each of said arms, ring gears defining the edges of suchapertures, a pinion shaft connected to be rotated by said drive shaftand extending through the apertures of said pattern cams in engagementwith the gears to thereby rotate such pattern cams, a single elongatedand movable follower disposed adjacent said pattern cams and moved bythe latter as an arm mounting a pattern cam is rocked to shift that caminto operating engagement with said follower and a connecting structurebetween and transmitting movements of the follower to the supportingmeans of the needle bar to impart to the latter lateral movements.

2. In a sewing machine as defined in claim 1, a mechanism forming a partthereof for displacing the stitching zone of the bar to one and theother side of a given point, a second operating assembly as defined inclaim 1 forming a P t of said machine and a second con- '8 nectingstructure between the follower of the latter assembly and said needlebar for displacing the latter to either side of such point.

3. In a sewing machine as defined in claim 2, a mechanism for feedingmaterial to be stitched past said needle bar, means forming a part ofsaid mechanism for varying the amount of such feed and the directionthereof, a third assembly also forming a part of said machine andcorresponding to the assembly as defined in claim 1 and a connectingstructure between the follower of that third assembly and the feedingmechanism for operating the latter.

4. In a sewing machine as defined in claim 2, a shaft common to bothassemblies and said shaft mounting the selector cams of both suchassemblies.

5. In a sewing machine as defined in claim 3, a pinion shaft common toall said assemblies and engaging the ring gears forming a part of thepattern cams thereof.

6. A sewing machine to produce ornamental stitches including incombination a needle bar, means for supporting the same forreciprocating and lateral movements, drive means operatively connectedto such bar for causing reciprocation of the latter, a rotatable camshaft, means operatively connecting said shaft to be rotated by saiddrive means, a plurality of cams supported to rotate with said shaft, asingle follower common to said cams and extending parallel to said camshaft, means securing said cams and follower against axial movement onewith respect to the other, means connecting said follower with saidneedle bar to cause lateral movements of the latter in response tomovements of said follower, and manually controlled means forselectively disposing said cams and follower in positions at which anelected one of said cams causes movements of said follower, saidmanually controlled means including a further rotatable shaft, rockinglymounted arms to cause movements of a cam and follower such that theyshift relative to each other to cause the surface of the cam tooperatively engage the follower, means carried by said further shaft andconnected with said arms for causing such shifting, said arms beingconnected one to each of said cams, the latter being each formed with anopening of a diameter greater than that of said cam shaft and said camshaft extending through and drivingly contacting the edges of saidopenings to cause rotation of said cams.

7. In a sewing machine as defined in claim 6, said cam shaft beingformed with axially extending teeth and each opening of said cams beingformed with a series of inwardly extending interengaging teeth definingthe edges of the openings.

8. In a sewing machine to produce ornamental stitches, in combination, amovably mounted needle bar, means for reciprocating said bar, a linkconnected to said bar for moving the same laterally, a plurality ofcams, axially disposed with respect to each other, means for rotatingsaid cams, supporting means to prevent axial movements of said cams,means operatively connected to said cams and bar reciprocating means forrotating said cams in timed relationship to the reciprocations of saidbar, a single follower extending across said cams, means supporting saidfollower solely for movements toward and away from the cams, selectiveengaging means connecting said follower solely with one of said cams,said selective engaging means comprising a manually rotatable shaft,selector cams secured to said shaft, rockingly mounted arms eachrotatably supporting one of said first named cams, and follower portionsforming parts of said arms to be engaged by said selector cams and thusrock an arm to move its supported cam into cooperating engagement withsaid follower.

9. In a sewing machine to produce ornamental stitches, in combination, amovably mounted needle bar, means for reciprocating said bar, a linkconnected to said bar for moving the same laterally, a plurality ofcams, axially disposed with respect to each other, means for rotatingsaid cams, supporting means to prevent axial movements of said cams,means operatively connected to said cams References Cited in the file ofthis patent and bar reciprocating means for rotating said cams in UNITEDSTATES PATENTS timed relationship to the recip rocations of said bar, asingle follower extending across said cams, means sup- 2109201 H111,July 2 porting said follower solely for movements toward and 5 i fi eta1 "g away from the cams, means connecting said follower d Son 1959solely with one of said cams, the means for rotating said 2938970 T 6ponstantme May 31, 1960 cams comprising a rotatable pinion shaftoperatlvely connected for movement with said bar as it reciprocates,said FOREIGN PATENTS cams being formed with openings of a diameterlarger 10 515,090 Italy Feb. 12, 1955 than that of said pinion shaft andgear teeth extending 1,139,759 France Feb. 18, 1957 inwardly from saidopenings and engaged by the teeth 1,153,315 France Sept. 30, 19 7 ofsaid pinion shaft. 792,784 Great Britain Apr. 2, 1958

